A self-locking and anti-loosening clamping mechanism for milling machines

Abstract

The present invention discloses a self-locking anti-loosening clamping mechanism for a milling machine, comprising a support seat, a limiting rod, a self-clamping mechanism and an anti-loosening mechanism, wherein the middle parts of both ends of the upper surface of the support seat are vertically connected with a support plate, and a reserved hole is provided on the support seat, the lower end of the limiting rod is movably extended into the corresponding reserved hole, and the upper end of the limiting rod is fixedly connected to the lower surface of the bearing plate, and the outer side of each limiting rod is provided with a spring, the upper and lower ends of which are respectively connected to the lower surface of the bearing plate and the upper surface of the support seat, and the six limiting rods are distributed at equal angles with respect to the axis of the bearing plate. The invention can facilitate the clamping and fixing of the workpiece in a simple manner, thereby facilitating the reduction of the labor burden of the staff and improving the work efficiency. In addition, in the process of processing the workpiece, the workpiece can be clamped tighter and tighter, thereby preventing the workpiece from loosening, avoiding the increased error between the processed workpiece and the drawing, so that the processed workpiece cannot be used.

Description

Technical Field

[0001] The invention relates to the technical field related to milling machines, in particular to a self-locking and anti-loosening clamping mechanism for milling machines. Background Art

[0002] Milling machines mainly refer to machine tools that use milling cutters to process the surface of workpieces. The surface of the workpiece is processed mainly by rotating the milling cutter and moving the workpiece and the milling cutter relative to each other. When the milling machine is processing, the workpiece needs to be clamped and fixed to prevent the workpiece from loosening during the processing, thereby ensuring that the workpiece can be processed stably and efficiently, and avoiding the finished product from not meeting the requirements of the drawings. The stability of the workpiece clamping directly affects the yield of the workpiece after processing;

[0003] The clamping mechanism on the milling machine is generally composed of a screw and a clamping block. The screw rotates to move the clamping block, thereby clamping the workpiece.

[0004] However, the existing milling machine clamping mechanism still has the following technical problems when in use, such as:

[0005] 1. The existing milling machine clamping mechanism requires manual rotation of the screw to drive the clamping block to move, thereby clamping the workpiece. This method is relatively cumbersome. The reason is that if the pitch of the screw is small, although it can ensure the stability of the clamping, it requires the staff to rotate the screw for a large number of turns, which is not conducive to improving work efficiency and reducing the labor burden of the staff. If the pitch of the screw is large, although the number of turns of the screw can be reduced, it cannot ensure that the workpiece is stably clamped, which is not conducive to ensuring that the workpiece is stably processed;

[0006] 2. The existing milling machine clamping mechanism is not provided with an anti-loosening structure. When the milling machine is processing the workpiece, it will exert a large force on the workpiece, which is easy to loosen the workpiece. Once the rigid clamping formed by the screw rod and the support block is loose, the workpiece will no longer be clamped. The workpiece after processing will inevitably exceed the error, so that the workpiece after processing does not meet the requirements of the drawing;

[0007] Therefore, a self-locking and anti-loosening clamping mechanism for a milling machine is needed to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to provide a self-locking and anti-loosening clamping mechanism for a milling machine, so as to solve the problems in the above background technology that the existing milling machine clamping mechanism is cumbersome to operate, not conducive to improving work efficiency and lacks an anti-loosening structure.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A self-locking and anti-loosening clamping mechanism for a milling machine comprises a support seat, a limit rod, a self-clamping mechanism and an anti-loosening mechanism, wherein the middle parts of both ends of the upper surface of the support seat are vertically connected to a support plate, and a reserved hole is provided on the support seat, the lower end of the limit rod movably extends into the corresponding reserved hole, and the upper end of the limit rod is fixedly connected to the lower surface of the bearing plate, and the outer side of each of the limit rods is provided with a spring whose upper and lower ends are respectively connected to the lower surface of the bearing plate and the upper surface of the support seat, and the six limit rods are distributed at equal angles with respect to the axis of the bearing plate, and the support seat and the bearing plate are also connected by the self-clamping mechanism, and the self-clamping mechanism is provided with an anti-loosening mechanism.

[0011] Furthermore, the self-clamping mechanism includes a slide groove, a slider, an arm, a connecting plate, a screw tube, a shaft rod, a support tube, a connecting tube, a movable block, an air channel, an air groove, a support column, a second spring, a support frame, a worm gear sleeve, a worm shaft, a transmission twist shaft, a screw rod, a piston plate, a shaft block, a shaft column, a connecting rod, a third spring, a limit plate and a mounting plate. The air groove is arranged on the upper surface of the support seat, and the lower end of the support column extends into the air groove. The upper end of the support column is coaxially connected to the lower surface of the bearing plate. Two air channels are connected through the air groove, and the two air channels are respectively connected to the two support tubes. The two support tubes are respectively fixedly connected to the two ends of the upper surface of the support seat, and the upper end of the support tube is threadedly extended into the lower end of the transmission twist shaft, the upper end of the transmission twist shaft is limited to the lower end of the worm shaft, and the worm shaft bearing passes through the upper part of the support frame, both sides of the worm shaft are connected with worm gear sleeves, and the worm gear sleeves on both sides of the worm shaft are respectively keyed to the two shaft rods, one end of the shaft rod is connected to the support plate by a bearing, and the other end of the shaft rod is coaxially connected with a spiral tube, the inner side of the outer end of the spiral tube is threadedly connected to one end of the screw rod, and the other end of the screw rod is fixedly connected to one side of the connecting plate. , two screw rods are symmetrically arranged on one side of each connecting plate, and two shaft blocks are symmetrically arranged on the other side of the connecting plate, the shaft blocks are connected to the corresponding connecting plates by damping bearings, and the bearings on the shaft blocks are connected to shaft columns, and each shaft column is fixedly connected to two connecting tubes with an angle between 30° and 60°, the outer end of each connecting tube is extended into one end of the corresponding connecting rod, and the other end of the connecting rod is sequentially connected to a limiting plate and a mounting plate, the mounting plate is densely covered with movable blocks, and a spring nested on the outside of the connecting rod is arranged between the limiting plate and the connecting tube. Spring three, both ends of the lower surface of each connecting plate are fixedly connected with one end of an arm rod, and the other end of the arm rod is provided with a slider, the slider is slidably connected in the corresponding slide groove, and the slide groove is provided on the upper surface of the support seat, the lower end of the support top column, the lower end of the transmission twist shaft and the end of the connecting rod extending into the connecting tube are coaxially connected with a piston plate, and the piston plate connected to the support top column, the transmission twist shaft and the connecting rod are seamlessly slidably connected with the inner wall of the air groove, the inner side of the support tube and the inner side of the connecting tube respectively, and a spring two is provided between the piston plate at the lower end of the transmission twist shaft and the inner bottom end of the support tube.

[0012] By adopting the above technical scheme, it is convenient to place the workpiece on the supporting plate at a certain angle and press the workpiece downward. By pressing the workpiece downward, the supporting plate can be moved downward with it, thereby causing the supporting column and the piston piece connected to it to move downward in the air groove. At the same time, the limiting rod moves into the reserved hole, and the spring is compressed. When the supporting column and the piston piece connected to it move downward in the air groove, the gas in the air groove is squeezed, so that the gas in the air groove is squeezed into the supporting tube through the air channel, thereby increasing the air pressure in the supporting tube, and then pushing the transmission twist shaft and the piston piece connected to it to move upward. In this process, the transmission twist shaft The twisted threads on the flower shaft and the upper end of the support tube can make the transmission twisted shaft move upward and rotate at the same time. When the transmission twisted shaft rotates, it drives the worm shaft to rotate, and then drives the two worm gear sleeves to rotate, so that the two shaft rods drive the two screw tubes to move, and then the lead screw drives the connecting plate to move, so that the connecting tube and the connected components gradually approach the workpiece until the movable block is close to the workpiece and clamps the workpiece. In the process of clamping the workpiece, the staff only needs to place the workpiece correctly on the load-bearing plate and press the workpiece to clamp the workpiece, thereby reducing the labor burden of the staff and improving work efficiency.

[0013] Furthermore, the upper end diameter of the support tube matches the middle and lower outer diameter of the transmission twisted shaft, and the inner side of the upper end of the support tube is provided with a twisted thread that matches the outer side of the transmission twisted shaft, and the lower end of the transmission twisted shaft is connected to the piston plate by a bearing connection.

[0014] By adopting the above technical solution, when the transmission twisted shaft moves upward, the transmission twisted shaft can be driven to rotate through the twisted thread between the transmission twisted shaft and the upper end of the support tube, thereby achieving the purpose of the transmission twisted shaft rotating and moving upward at the same time.

[0015] Furthermore, the upper portion of the transmission twist shaft is prismatic, and the lower end of the worm shaft is provided with a prismatic groove that matches the upper portion of the transmission twist shaft.

[0016] By adopting the above technical solution, the worm shaft can be driven to rotate by rotating the transmission twist shaft, and the upward movement of the transmission twist shaft does not affect the position of the worm shaft, thereby ensuring stable transmission of the worm shaft and the worm gear sleeve.

[0017] Furthermore, the distance between the sliding block and the axial surface of the support seat is smaller than the distance between the connecting plate connected thereto through the arm and the axial surface of the support seat.

[0018] The above technical solution can ensure that the slider slides in the slide groove, thereby avoiding the problem that the slider cannot slide in the slide groove when there are small foreign objects in the slide groove.

[0019] Furthermore, the anti-loosening mechanism includes rubber tubes and solenoid valves, the number of the rubber tubes is the same as the number of connecting tubes, and each connecting tube is connected to one end of a corresponding rubber tube, and the other end of the rubber tube is connected to the corresponding supporting tube, and the solenoid valves are arranged on the airway, the supporting tube and the connecting tube.

[0020] By adopting the above technical scheme, through the setting of the electromagnetic valve, when clamping the workpiece, the gas in the air groove can only be pressed into the air channel, thereby ensuring that the workpiece is stably clamped. When the workpiece needs to be loosened, the gas can flow back into the air groove through the electromagnetic valve. When the workpiece becomes loose during processing, the connecting rod and the piston piece connected to it will move in the connecting pipe, thereby squeezing the gas in the connecting pipe into the rubber tube and flowing into the supporting pipe. Through the electromagnetic valve on the supporting pipe, when processing the workpiece, the gas can only enter the supporting pipe, thereby increasing the air pressure in the supporting pipe, causing the transmission twist shaft and the piston piece connected to it to move upward, thereby achieving the workpiece. It is clamped again, and in the process of loosening the workpiece, the connecting rod will move back and forth through spring three. In the process of reciprocating movement, the external gas can continuously enter the connecting pipe through the solenoid valve on the connecting pipe, and then continuously enter the supporting pipe, so that the loosening of the workpiece becomes less and less during the processing, thereby achieving the purpose of preventing the workpiece from loosening. At the same time, after the workpiece is processed, the solenoid valve is controlled so that the gas in the supporting pipe can flow in the reverse direction, and then the spiral tube can be moved in the reverse direction through spring two, thereby achieving the purpose of loosening the workpiece first, and then the supporting plate is moved down and reset, so that the processed workpiece can be easily removed.

[0021] Furthermore, the natural height of the connecting plate is greater than the height of the upper surface of the carrying plate.

[0022] The above technical solution can ensure that the workpiece can be clamped as it moves downward with the supporting plate, avoiding the problem that when the height of the workpiece is higher than the connecting plate, the movable block has extended under the supporting plate, causing the movable block to be unable to clamp the workpiece.

[0023] Furthermore, the outer end of the movable block is hemispherical, and the movable block movably penetrates the mounting plate, and the length of the connecting plate is consistent with the diameter of the bearing plate.

[0024] By adopting the above technical solution, the movable block can stably contact the workpiece to avoid damage to the workpiece, and the movable block can be easily moved on the mounting plate to adapt to the shape of the workpiece.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the self-locking anti-loosening type clamping mechanism for a milling machine can conveniently clamp and fix the workpiece in a simple manner, thereby conveniently reducing the labor burden of the staff and improving the work efficiency. In addition, the workpiece can be clamped tighter and tighter during the processing of the workpiece, thereby preventing the workpiece from loosening and avoiding an increased error between the processed workpiece and the drawing, so that the processed workpiece cannot be used:

[0026] 1. By pressing down the bearing plate, the gas in the gas groove enters the support tube through the air channel, and then the transmission twist shaft in the support tube rotates and moves upward. When the transmission twist shaft rotates, it drives the worm gear structure composed of the worm gear sleeve and the worm shaft to transmit, and then the shaft drives the screw tube to rotate, and the lead screw drives the connecting plate to move, and then drives the connecting tube, the top support column, the mounting plate and the movable block to move, so as to clamp the workpiece. In this process, the staff only needs to place the workpiece on the bearing plate according to the accurate position, and press down the workpiece and the bearing plate to achieve the clamping and fixing of the workpiece, thereby reducing the labor burden of the staff and improving work efficiency;

[0027] 2. Through the setting of the solenoid valve, during the process of clamping and processing the workpiece, the external gas can enter the connecting pipe in one direction, and the gas in the connecting pipe can enter the supporting pipe in one direction through the rubber tube, and the gas in the air groove can enter the airway in one direction, so that the movable block can clamp the workpiece tighter and tighter, thereby preventing the workpiece from loosening, ensuring that it can be processed stably, and avoiding the problem that the processed workpiece does not meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of point A;

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of point B in the middle;

[0032] Figure 5 It is a schematic diagram of the connection structure between the connecting plate and the transmission twist shaft of the present invention;

[0033] Figure 6 This is a schematic diagram of the connection structure of the support pipe and the connecting pipe of the present invention;

[0034] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0035] In the figure: 1. support seat; 2. slide groove; 3. slider; 4. arm; 5. connecting plate; 6. screw tube; 7. shaft rod; 8. support plate; 9. support tube; 10. limit rod; 11. load-bearing plate; 12. spring one; 13. connecting tube; 14. movable block; 15. rubber tube; 16. air duct; 17. solenoid valve; 18. air groove; 19. top support column; 20. spring two; 21. support frame; 22. worm gear sleeve; 23. worm shaft; 24. transmission twist shaft; 25. screw; 26. piston plate; 27. shaft block; 28. shaft column; 29. ​​connecting rod; 30. spring three; 31. limit plate; 32. installation plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-7 , the present invention provides a technical solution: Embodiment 1

[0038] In order to solve the problem that the clamping mechanism of the milling machine in the past is cumbersome to operate, which is not conducive to reducing the labor intensity of the staff and improving the work efficiency, the following technical solution is now provided, specifically,

[0039] A self-locking and anti-loosening clamping mechanism for a milling machine comprises a support seat 1, a limiting rod 10, a self-clamping mechanism and an anti-loosening mechanism. The middle parts of both ends of the upper surface of the support seat 1 are vertically connected with a support plate 8, and a reserved hole is provided on the support seat 1. The lower end of the limiting rod 10 is movably extended into the corresponding reserved hole, and the upper end of the limiting rod 10 is fixedly connected to the lower surface of the bearing plate 11. The outer side of each limiting rod 10 is provided with a spring 12 whose upper and lower ends are respectively connected to the lower surface of the bearing plate 11 and the upper surface of the support seat 1. The six limiting rods 10 are distributed at equal angles with respect to the axis of the bearing plate 11. The support seat 1 and the bearing plate 11 are also connected by a self-clamping mechanism. The self-clamping mechanism comprises a slide groove 2, a slider 3, an arm rod 4, a connecting plate 5, a screw tube 6, a shaft rod 7, and a support tube 9. , connecting pipe 13, movable block 14, air channel 16, air groove 18, support column 19, spring two 20, support frame 21, worm gear sleeve 22, worm shaft 23, transmission twist shaft 24, screw 25, piston plate 26, shaft block 27, shaft column 28, connecting rod 29, spring three 30, limit plate 31 and mounting plate 32, the air groove 18 is arranged on the upper surface of the support seat 1, and the lower end of the support column 19 is extended into the air groove 18, and the upper end of the support column 19 is coaxially connected to the lower surface of the bearing plate 11, and two air channels 16 are connected in the air groove 18, and the two air channels 16 are respectively connected with two support pipes 9, and the two support pipes 9 are respectively fixedly connected to the two ends of the upper surface of the support seat 1, and the upper end of the support pipe 9 is threadedly extended into the lower end of the transmission twist shaft 24, and the transmission twist shaft The upper end of the flower axis 24 is limited to the lower end of the worm shaft 23, and the bearing of the worm shaft 23 passes through the upper part of the support frame 21. Worm gear sleeves 22 are connected to both sides of the worm shaft 23, and the worm gear sleeves 22 on both sides of the worm shaft 23 are respectively keyed to two shaft rods 7, one end of the shaft rod 7 is connected to the support plate 8 by a bearing, and the other end of the shaft rod 7 is coaxially connected to a screw tube 6, and the inner side of the outer end of the screw tube 6 is threadedly connected to one end of the screw rod 25, and the other end of the screw rod 25 is fixedly connected to one side of the connecting plate 5, and two screw rods 25 are symmetrically arranged on one side of each connecting plate 5, and two shaft blocks 27 are symmetrically arranged on the other side of the connecting plate 5, and the shaft blocks 27 are connected to the corresponding connecting plate 5 by damping bearings, and the shaft blocks 27 are connected to shaft columns 28 by bearings, and each shaft column 28 has Two connecting tubes 13 with an angle between 30° and 60° are fixedly connected, and one end of the corresponding connecting rod 29 is extended into the outer end of each connecting tube 13, and the other end of the connecting rod 29 is connected to the limiting plate 31 and the mounting plate 32 in sequence, and the mounting plate 32 is densely connected with movable blocks 14, and a spring 30 nested in the outer side of the connecting rod 29 is arranged between the limiting plate 31 and the connecting tube 13, and both ends of the lower surface of each connecting plate 5 are fixedly connected to one end of the arm rod 4, and the other end of the arm rod 4 is provided with a slider 3, the slider 3 is slidably connected in the corresponding slide groove 2, and the slide groove 2 is arranged on the upper surface of the support seat 1, and the lower end of the top support column 19, the lower end of the transmission twisted shaft 24 and the end of the connecting rod 29 extending into the connecting tube 13 are coaxially connected with the piston plate 26,The piston piece 26 connected to the top support column 19, the transmission twisted shaft 24 and the connecting rod 29 are seamlessly slidably connected to the inner wall of the air groove 18, the inner side of the support tube 9 and the inner side of the connecting tube 13, respectively. A spring 20 is arranged between the piston piece 26 at the lower end of the transmission twisted shaft 24 and the inner bottom end of the support tube 9. The upper end diameter of the support tube 9 coincides with the outer diameter of the middle and lower part of the transmission twisted shaft 24, and the inner side of the upper end of the support tube 9 is provided with a twisted thread that coincides with the outer side of the transmission twisted shaft 24, and the lower end of the transmission twisted shaft 24 is connected by a bearing. The upper part of the transmission twist shaft 24 is prismatic, and the lower end of the worm shaft 23 is provided with a prismatic groove that matches the upper part of the transmission twist shaft 24. The distance between the slider 3 and the axial surface of the support seat 1 is less than the distance between the connecting plate 5 connected by the arm 4 and the axial surface of the support seat 1. The natural height of the connecting plate 5 is greater than the height of the upper surface of the bearing plate 11. The outer end of the movable block 14 is hemispherical, and the movable block 14 is movable through the installation plate 32. The length of the connecting plate 5 matches the diameter of the bearing plate 11.

[0040] When in use, the workpiece is placed on the carrier plate 11 in the correct position, and the carrier plate 11 is pressed down, so that the carrier plate 11 moves down synchronously with the workpiece. When the carrier plate 11 moves down, the limit rod 10 moves into the reserved hole to ensure that the carrier plate 11 moves down stably, and the spring 12 is compressed, so that the subsequent carrier plate 11 is reset;

[0041] When the support plate 11 moves downward, the support column 19 and the piston sheet 26 connected thereto are driven to move in the gas groove 18, thereby squeezing the gas in the gas groove 18, so that the gas in the gas groove 18 enters the gas passage 16 in one direction, and then enters the support tube 9;

[0042] After the gas enters the support tube 9, the gas pressure in the support tube 9 increases, so that the lower end of the transmission twisted shaft 24 and the piston plate 26 in the support tube 9 move upward, and the transmission twisted shaft 24 and the upper end of the support tube 9 are connected by a twisted thread, so that the transmission twisted shaft 24 can rotate during the upward movement;

[0043] When the transmission twist shaft 24 rotates, the prism-shaped structure of the upper end of the transmission twist shaft 24 and the inner side of the lower end of the worm shaft 23 are mutually matched, so as to achieve the purpose of driving the worm shaft 23 to rotate synchronously. When the worm shaft 23 rotates, the worm gear sleeves 22 on both sides thereof drive the shaft 7 to rotate, thereby causing the screw tube 6 to rotate relative to the screw rod 25, so that the screw rod 25 drives the connecting plate 5 to move, so that the connecting tube 13, the connecting rod 29 and the movable block 14 gradually approach the workpiece;

[0044] Since the shaft column 28 and the shaft block 27 are bearing-connected, and the shaft block 27 can rotate with damping relative to the connecting plate 5, the movable block 14 can contact the workpiece in different directions and positions to adapt to the shapes of different workpieces. In addition, since the movable block 14 is also a movable structure and has a number of angles, it can further adapt to the shape of the workpiece. Embodiment 2

[0045] In order to solve the problem that the clamping mechanism of the milling machine in the past does not have a mechanism to prevent the workpiece from loosening, which easily causes the workpiece to loosen more and more during the processing, resulting in large errors in the workpiece processing, specifically,

[0046] The self-clamping mechanism is provided with an anti-loosening mechanism, which includes a rubber tube 15 and a solenoid valve 17. The number of the rubber tubes 15 is the same as the number of the connecting tubes 13, and each connecting tube 13 is connected to one end of the corresponding rubber tube 15, and the other end of the rubber tube 15 is connected to the corresponding support tube 9. The solenoid valve 17 is provided on the airway 16, the support tube 9 and the connecting tube 13.

[0047] When in use, the solenoid valve 17 is controlled to control the direction of gas flow, thereby achieving different purposes in the process of clamping the workpiece, in the process of processing the workpiece, and in the process of removing the processed workpiece, as follows:

[0048] In the process of clamping the workpiece, the solenoid valve 17 is controlled so that the gas in the gas groove 18 can only enter the support tube 9, thereby ensuring that the transmission twisted shaft 24 in the support tube 9 can only move upward, so that the movable block 14 can only gradually approach the workpiece but cannot move away from the workpiece, thereby ensuring that the workpiece is stably clamped. The worm gear structure composed of the worm gear sleeve 22 and the worm shaft 23 can not only save effort, but also has a self-locking function. In combination with the self-locking of the threaded connection of the screw tube 6 and the lead screw 25, the stability of the workpiece clamping can be further ensured.

[0049] During the processing of the workpiece, by controlling the solenoid valve 17, the external gas can only enter the connecting pipe 13 in one direction, and the gas in the connecting pipe 13 can only enter the supporting pipe 9 in one direction through the rubber tube 15, thereby increasing the air pressure in the supporting pipe 9, so that the transmission twisted shaft 24 has a tendency to move upward, thereby ensuring that during the processing of the workpiece, the workpiece will only be clamped tighter and tighter, thereby preventing it from loosening;

[0050] When it is necessary to remove the finished workpiece, the solenoid valve 17 is controlled to allow the gas in the support tube 9 to flow back into the connecting tube 13 and be discharged to the external environment through the solenoid valve 17 connected to the connecting tube 13. At this time, the movable block 14 will be away from the workpiece, so that the workpiece can be removed from the supporting plate 11. At the same time, the gas in the connecting tube 13 can also flow back into the gas groove 18, so that the supporting plate 11 is reset under the action of the spring 12.

[0051] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking and anti-loosening clamping mechanism for a milling machine, comprising a support seat (1), a limit rod (10), a self-clamping mechanism and an anti-loosening mechanism, Features: The middle parts of both ends of the upper surface of the support seat (1) are vertically connected to the support plate (8), and the support seat (1) is provided with a reserved hole. The lower end of the limit rod (10) is movably extended into the corresponding reserved hole, and the upper end of the limit rod (10) is fixedly connected to the lower surface of the bearing plate (11). The outer side of each limit rod (10) is provided with a spring (12) whose upper and lower ends are respectively connected to the lower surface of the bearing plate (11) and the upper surface of the support seat (1). The six limit rods (10) are distributed at equal angles with respect to the axis of the bearing plate (11). The support seat (1) and the bearing plate (11) are also connected by a self-clamping mechanism, and the self-clamping mechanism includes a slide groove (2), a slider (3), an arm rod (4), a connecting plate (5), a screw tube ( 6), shaft (7), support tube (9), connecting tube (13), movable block (14), airway (16), air groove (18), support column (19), spring 2 (20), support frame (21), worm gear sleeve (22), worm shaft (23), transmission twist shaft (24), screw (25), piston plate (26), shaft block (27), shaft column (28), connecting rod (29), spring 3 (30), limit plate (31) and mounting plate (32), wherein the air groove (18) is arranged on the upper surface of the support seat (1), and the lower end of the support column (19) extends into the air groove (18), the upper end of the support column (19) is coaxially connected to the lower surface of the bearing plate (11), and two airways are connected through the air groove (18). (16), and the two air passages (16) are respectively connected to the two support tubes (9), the two support tubes (9) are respectively fixedly connected to the two ends of the upper surface of the support seat (1), and the upper end of the support tube (9) is threadedly extended into the lower end of the transmission twist shaft (24), the upper end of the transmission twist shaft (24) is limited to the lower end of the worm shaft (23), and the bearing of the worm shaft (23) passes through the upper part of the support frame (21), both sides of the worm shaft (23) are connected to worm gear sleeves (22), and the worm gear sleeves (22) on both sides of the worm shaft (23) are respectively keyed to the two shaft rods (7), one end of the shaft rod (7) is connected to the support plate (8), and the other end of the shaft rod (7) is coaxially connected to a spiral tube (6), the outer One end of a screw rod (25) is threadedly connected to the inner side of the end, and the other end of the screw rod (25) is fixedly connected to one side of the connecting plate (5), two screw rods (25) are symmetrically arranged on one side of each connecting plate (5), and two shaft blocks (27) are symmetrically arranged on the other side of the connecting plate (5), the shaft blocks (27) are connected to the corresponding connecting plate (5) by means of a damping bearing, and the shaft blocks (27) are connected to the shaft columns (28) by the bearings, and each shaft column (28) is fixedly connected to two connecting tubes (13) with an angle between 30° and 60°, the outer end of each connecting tube (13) is extended into one end of a corresponding connecting rod (29), and the other end of the connecting rod (29) is sequentially connected to a limiting plate (31) and a mounting plate (32),The mounting plate (32) is densely covered with movable blocks (14) connected thereto. A spring (30) is arranged between the limit plate (31) and the connecting tube (13) and is nested on the outside of the connecting rod (29). Both ends of the lower surface of each connecting plate (5) are fixedly connected to one end of an arm (4), and a slider (3) is arranged at the other end of the arm (4). The slider (3) is slidably connected to a corresponding slide groove (2), and the slide groove (2) is arranged on the upper surface of the support seat (1). The lower end of the support column (19), the lower end of the transmission twist shaft (24) and the end of the connecting rod (29) extending into the connecting tube (13) are coaxially connected to a piston plate (26), and the piston plate connected to the support column (19), the transmission twist shaft (24) and the connecting rod (29) is (26) are seamlessly slidably connected to the inner wall of the air groove (18), the inner side of the support tube (9) and the inner side of the connecting tube (13), respectively; a spring 2 (20) is arranged between the piston plate (26) at the lower end of the transmission twisted shaft (24) and the inner bottom end of the support tube (9); an anti-loosening mechanism is arranged on the self-clamping mechanism, and the anti-loosening mechanism includes a rubber tube (15) and a solenoid valve (17); the number of the rubber tubes (15) is the same as the number of the connecting tubes (13), and each connecting tube (13) is connected to one end of the corresponding rubber tube (15), and the other end of the rubber tube (15) is connected to the corresponding supporting tube (9); the solenoid valve (17) is arranged on the airway (16), the supporting tube (9) and the connecting tube (13).

2. A self-locking and anti-loosening clamping mechanism for a milling machine according to claim 1, It is characterized in that The diameter of the upper end of the support tube (9) matches the outer diameter of the middle and lower parts of the transmission twisted shaft (24), and the inner side of the upper end of the support tube (9) is provided with a twisted thread that matches the outer side of the transmission twisted shaft (24), and the lower end of the transmission twisted shaft (24) is connected to the piston plate (26) in a bearing connection manner.

3. A self-locking and anti-loosening clamping mechanism for a milling machine according to claim 2, It is characterized in that The upper portion of the transmission twist shaft (24) is prismatic, and the lower end of the worm shaft (23) is provided with a prismatic groove that matches the upper portion of the transmission twist shaft (24).

4. A self-locking and anti-loosening clamping mechanism for a milling machine according to claim 3, Features: The distance between the sliding block (3) and the axial surface of the support seat (1) is smaller than the distance between the connecting plate (5) connected to the sliding block (3) via the arm (4) and the axial surface of the support seat (1).

5. A self-locking and anti-loosening clamping mechanism for a milling machine according to claim 4, Features: The natural height of the connecting plate (5) is greater than the height of the upper surface of the carrying plate (11).

6. A self-locking and anti-loosening clamping mechanism for a milling machine according to claim 5, Features: The outer end of the movable block (14) is hemispherical, and the movable block (14) movably penetrates the installation plate (32).

7. A self-locking and anti-loosening clamping mechanism for a milling machine according to claim 6, Features: The length of the connecting plate (5) matches the diameter of the bearing plate (11).

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